CN111234622B

CN111234622B - Interface water for repairing water-based industrial coating finish paint and application thereof

Info

Publication number: CN111234622B
Application number: CN202010019299.0A
Authority: CN
Inventors: 秦玉猛; 杨玉涛; 王雪三
Original assignee: Nippon Industry Paint Shanghai Co ltd
Current assignee: Nippon Industry Paint Shanghai Co ltd
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2021-08-31
Anticipated expiration: 2040-01-08
Also published as: CN111234622A

Abstract

The invention discloses interface water for repairing water-based industrial coating finish paint, which comprises the following components in parts by weight: 5-10 parts of a first solvent; 30-50 parts of a second solvent; 20-40 parts of a third solvent; 5-10 parts of a fourth solvent; 6-10 parts of thermoplastic acrylic resin; 0.1-2 parts of a surfactant; wherein the boiling point of the first solvent is not lower than 190 ℃, and the first solvent is miscible with water in any proportion; the boiling point of the second solvent is 160-189 ℃, and the second solvent is miscible with water in any proportion; the boiling point of the third solvent is 110-159 ℃, and the solubility in water is 1.0-15.0%; the boiling point of the fourth solvent is 60-109 ℃, and the solubility of the fourth solvent in water is 5.0-100.0%. The interface water can eliminate the problems of shrinkage cavity, whitening, light loss and the like in the repairing process, and the repaired paint surface is uniform and bright and has no repairing trace, thereby having wide application prospect.

Description

Interface water for repairing water-based industrial coating finish paint and application thereof

Technical Field

The invention relates to the technical field of coatings. More particularly relates to interface water for repairing water-based industrial coating finish and application thereof.

Background

In the construction process of industrial paint finish, the condition of needing rework often occurs. Such as local paint film foaming, shrinkage cavity, sagging and the like, leakage spraying and paint film damage in the assembling process; at this time, a rework process is required. There are two common rework approaches, one is rework and re-painting, and the other is repair after local polishing. Local repair is a more acceptable way to save a lot of labor and material costs. However, during repair, the local spraying is bound to generate an interface, and the splashed paint mist forms a circle of dull interface around the repaired area. At the moment, proper interface water is sprayed on the interface, so that paint mist can be dissolved, the interface is not obvious, and uniform and bright continuous coating is formed.

The interface water of solvent-based finish paint is already on the market, but cannot be used for repairing the interface of water-based industrial paint finish paint. The main problems are as follows:

1. most of solvent-based interface water adopts a water-insoluble organic solvent, and shrinkage cavities are generated when the solvent-based interface water is sprayed on the surface of the water-based industrial paint finish.

2. The solvent-based interface water is not compatible with the water-based industrial coating finish paint, and the phenomenon of light loss can be caused.

3. The solvent-based interface is slow to dry by water, and when the solvent-based interface is used for repairing a water-based industrial paint finish paint interface, the solvent-based interface is easy to be dusted due to too long drying time and cannot be quickly transported.

4. The solvent-based interface water is used for repairing a water-based industrial coating finish paint interface and can cause a whitening phenomenon in high-humidity weather.

Therefore, it is desirable to provide a joint water suitable for the repair of water-based industrial paint finishes without causing shrinkage cavities, loss of gloss, and blushing.

Disclosure of Invention

The invention aims to provide interface water for repairing water-based industrial coating finish paint, which can effectively solve the problems of shrinkage cavity, color change, sagging and light loss caused by the current solvent-based interface water and realize uniform, bright and traceless repair.

The invention also aims to provide an application method of the interface water for repairing the water-based industrial paint finish.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the invention provides interface water for repairing water-based industrial paint finish, which comprises the following components in parts by weight:

5-10 parts of a first solvent; 30-50 parts of a second solvent; 20-40 parts of a third solvent; 5-10 parts of a fourth solvent; 6-10 parts of thermoplastic acrylic resin; 0.1-2 parts of a surfactant;

wherein the boiling point of the first solvent is not lower than 190 ℃, and the first solvent is miscible with water in any proportion;

the boiling point of the second solvent is 160-189 ℃, and the second solvent is miscible with water in any proportion;

the boiling point of the third solvent is 110-159 ℃, and the solubility in water is 1.0-15.0%;

the boiling point of the fourth solvent is 60-109 ℃, and the solubility of the fourth solvent in water is 5.0-100.0%.

Optionally, the number average molecular weight of the thermoplastic acrylic resin is 20000-50000, and the weight average molecular weight is 40000-100000.

Optionally, the glass transition temperature of the thermoplastic acrylic resin is 55-65 ℃.

Optionally, the first solvent is an ether ester solvent;

preferably, the ether ester solvent is selected from diethylene glycol ethyl ether acetate or/and diethylene glycol diethyl ether.

Optionally, the second solvent is an alcohol ether solvent;

preferably, the alcohol ether solvent is selected from butoxyethanol or/and diethylene glycol dimethyl ether.

Optionally, the third solvent is a ketone solvent with a boiling point of 110 ℃ to 159 ℃;

preferably, the ketone solvent with the boiling point of 110-159 ℃ is selected from methyl isobutyl ketone or/and cyclohexanone.

Optionally, the fourth solvent is selected from an ester solvent with a boiling point of 60-109 ℃ or a ketone solvent with a boiling point of 60-109 ℃;

preferably, the fourth solvent is selected from methyl ethyl ketone or/and ethyl acetate.

Optionally, the surfactant is a polyalkylsiloxane or a modified polymer of a polyalkylsiloxane.

In a second aspect, the invention provides an application of interface water for repairing a water-based industrial paint finish, which is characterized by comprising the following steps:

spraying the water-based industrial paint finish on a place needing to be repaired; after 3-5min, spraying the interface water on the periphery of the interface and the paint surface of the whole repaired surface until the paint surface is glossy; after 3-5min, a paint surface which is uniform and bright and has no repairing trace can be formed.

The invention has the following beneficial effects:

the common interface water sold in the market is solvent type interface water, only solvent industrial paint can be repaired, and when the common interface water is used for repairing water industrial paint, the defects of shrinkage cavity, color change, light loss and the like can occur; the interface water provided by the invention comprises four solvents with different boiling points, thermoplastic acrylic resin and surface activity, is suitable for the repairing process of the water-based industrial paint finish, can eliminate the problems of shrinkage cavity, whitening, light loss and the like in the repairing process, and has a uniform and bright paint surface without repairing marks; the whole spraying process caused by the failure of repair is avoided, and materials and working hours are saved. Meanwhile, the interface water is quick to dry, convenient to use and moderate in price, can be well suitable for the Chinese market, and can be popularized and popularized in a large area.

Detailed Description

In order to make the technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be further described in detail with reference to specific embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

In the case where the objects of the present invention are illustrated and explained by the following examples, the components of the composition are all explained on the general standard of parts by weight. In the present invention, the term "part" is used in the same sense as part by weight for the sake of brevity without specific mention.

In the prior art, the condition of needing rework repair often occurs in the application and construction process of industrial paint finish. The repair paint is sprayed on the surface of the original coating, the problems of light loss, orange peel and the like can occur at the spraying interface, the repair mark is obvious, and the surface of the paint film is not uniform. The interface water of the solvent-based finish paint is sprayed and coated on the interface of the water-based paint finish paint, so that the problems of light loss, orange peel and the like cannot be solved, and the problems of blushing, color change, shrinkage cavity and the like can be caused.

Aiming at the problems, the invention provides interface water for repairing water-based industrial paint finish, which comprises the following components in parts by weight:

The interface water comprises four solvents with different boiling points and thermoplastic acrylic resin, and can realize quick-drying, shrinkage-hole-free, non-dulling and non-whitening repair when being applied to the repair of the water-based industrial paint finish, and the obtained repair paint surface is uniform and bright and has no repair mark. The water-based paint is mainly determined by the components of the interface water, and particularly, the slow-drying solvent which has a higher boiling point and is miscible with water ensures the compatibility of the interface water and the water-based paint, and avoids the undesirable defects of shrinkage cavity, color change and the like; the quick-drying solvent with a lower boiling point and lower compatibility with water provides excellent dissolving capacity, ensures that interface water has good gloss, and because the quick volatilization ensures that most of the interface water volatilizes in the spraying process, the compatibility with the water-based paint cannot be influenced; and the thermoplastic acrylic resin ensures that interface water is quickly and completely dried, and provides convenience for construction.

One possible implementation manner is that the number average molecular weight of the thermoplastic acrylic resin is 20000-50000, and the weight average molecular weight is 40000-100000; the thermoplastic acrylic resin has high glossiness, good color retention, high drying speed and good miscibility with a solvent, can be fully dispersed in an organic solvent, and prevents sagging and color spots. More preferably, the glass transition temperature of the thermoplastic acrylic resin is 55-65 ℃. One skilled in the art can commercially purchase satisfactory thermoplastic acrylic resins including, but not limited to, ARC 980 resin, manufactured by japan coatings corporation.

The first solvent in the invention has a high boiling point of 190 ℃ or above, belongs to a slow-drying solvent, can be mixed with water in any proportion, and is generally an ether ester solvent, including but not limited to diethylene glycol ethyl ether acetate, diethylene glycol diethyl ether and the like. The solvent is relatively slow in volatilization, can be partially remained on a paint film in the process of spraying interface water, and has good phase solvent with water paint because of being mixed with water, so that shrinkage cavities can be avoided.

The boiling point of the second solvent is 160-189 ℃, the second solvent has medium volatilization speed, can be mixed and dissolved with water in any proportion, is usually an alcohol ether solvent, and has the function of preventing the paint surface from whitening in the interface water. One skilled in the art can commercially purchase a variety of eligible solvents including butoxyethanol, diglyme.

One possible implementation way is that the third solvent is a ketone solvent with a boiling point of 110-159 ℃, has strong dissolving power, and is preferably methyl isobutyl ketone or/and cyclohexanone. The solvent provides excellent dissolving capacity, ensures that interface water has good gloss, and most of the interface water is volatilized in the spraying process, so shrinkage cavities caused by limited water solubility are avoided.

The fourth solvent is a fast drying solvent having a boiling point of 60-110 deg.C, and is typically a ketone or ester solvent, including but not limited to methyl ethyl ketone, ethyl acetate, etc. The solvent can provide excellent dissolving capacity, ensures that the interface water has excellent gloss, can adjust the volatilization speed of the interface water, and can volatilize most of the interface water because of quick volatilization in the spraying process, thereby avoiding shrinkage cavity no matter whether the interface water is mixed with water or not.

Surfactants are common adjuvants for coatings to adjust the surface tension of solutions, and one possible implementation is that the surfactants are polyalkylsiloxanes or modified polymers of polyalkylsiloxanes, which have high clarity and low surface tension. The surfactant is commercially available to those skilled in the art, and is preferably commercially available under the trade designation TEGO GLIDE 410, TEGO TWIN 4100, BYK-300, BYK-306, BYK-333, and the like, in one or more mixtures.

One possible preparation process of the interface water provided by the invention is as follows: under the condition of stirring, sequentially putting 5-10 parts of first solvent, 30-50 parts of second solvent, 20-40 parts of third solvent, 5-10 parts of fourth solvent, 6-10 parts of thermoplastic acrylic resin and 0.1-2 parts of surfactant into a container, continuously stirring until the first solvent, the fourth solvent, the thermoplastic acrylic resin and the surfactant are fully mixed and dissolved, and then filtering by using 200-mesh silk cloth to obtain filtrate, namely the interface water meeting the requirement.

One possible application process of the interface water for repairing the water-based industrial paint finish disclosed by the invention is as follows: spraying the water-based industrial paint finish on a place needing to be repaired; after 3-5min, spraying the interface water on the periphery of the interface and the paint surface of the whole repaired surface until the paint surface is glossy; after 3-5min, a paint surface which is uniform and bright and has no repairing trace can be formed.

The common solvent-based interface water in the market has limited compatibility with water-based paint, can only repair solvent-based industrial finish paint, is slow to dry, and has the defects of shrinkage cavity, discoloration, light loss, poor drying and the like when the water-based industrial paint is repaired. The interface water provided by the invention can eliminate the light loss caused by paint mist at the interface when the water-based industrial paint finish is repaired, and form a bright and uniform paint film, so that the water-based industrial paint finish can be repaired, and the waste of materials and working hours caused by the integral reworking is avoided.

The present invention will be described with reference to specific examples.

The various reagent information used in the examples below is as follows:

1, first solvent: diethylene glycol ethyl ether acetate manufactured by dow chemical (china) ltd; diethylene glycol diethyl ether manufactured by Jiangsu Tianyin chemical engineering Co., Ltd.

2, second solvent: butoxyethanol manufactured by dow chemical (china) limited; diethylene glycol dimethyl ether produced by Jiangsu Tianyin chemical industry Co.

3, third solvent: methyl isobutyl ketone manufactured by Jiangsu Tianyin chemical engineering Co., Ltd; cyclohexanone produced by Yueyang petrochemical Co.

4, fourth solvent: methyl ethyl ketone and ethyl acetate produced by Jiangsu Tianyin chemical Co., Ltd;

5, thermoplastic acrylic resin: ARC 980 resin manufactured by Japan paint Corp.

6, surfactant: TEGO GLIDE 410 and TEGO TWIN 4100, available from Woundplast Special chemical (China) Co., Ltd; BYK-300, BYK-306 and BYK-333 manufactured by Pyk chemical (China) Ltd.

Example 1

The components of the water-based industrial paint interface water in the embodiment 1 are as follows: 5 parts of diethylene glycol ethyl ether acetate, 35 parts of butoxyethanol, 40 parts of methyl isobutyl ketone, 7 parts of methyl ethyl ketone, 7.7 parts of ACR 980 resin and 0.3 part of TEGO GLIDE 410.

Example 2

The components of the interface water in the water-based industrial paint of the embodiment 2 are as follows: 10 parts of diethylene glycol diethyl ether, 33 parts of diethylene glycol dimethyl ether, 40 parts of methyl isobutyl ketone, 10 parts of methyl ethyl ketone, 6.2 parts of ACR 980 resin and 0.8 part of BYK-333.

Example 3

The components of the interface water in the water-based industrial paint in the embodiment 3 are as follows: 5 parts of diethylene glycol ethyl ether acetate, 45 parts of butoxyethanol, 35 parts of cyclohexanone, 5 parts of methyl ethyl ketone; 9 parts of ACR 980 resin and 1 part of BYK-306.

Example 4

The components of the interface water in the water-based industrial paint of the embodiment 4 are as follows: 8 parts of diethylene glycol ethyl ether acetate, 50 parts of butoxyethanol, 22 parts of methyl isobutyl ketone and 10 parts of ethyl acetate; 9.7 parts ACR 980 resin and 0.3 part BYK-300.

Comparative example

Comparative example 1

The components of the water-based industrial paint interface water of the comparative example 1 are as follows: 20 parts of xylene, 20 parts of toluene, 15 parts of ethyl acetate, 15 parts of butyl acetate, 10 parts of ethylene glycol butyl ether acetate, 10 parts of methyl ethyl ketone, 0.2 part of EFKA3777 and 10 parts of D.E. FS 3270.

Comparative example 2

The components of the water-based industrial paint interface water of the comparative example 2 are as follows: 20 parts of diethylene glycol monoethyl ether acetate, 25 parts of butoxyethanol, 35 parts of methoxypropanol and 10 parts of ethanol; 9 parts of ACR 980 resin and 1 part of BYK-310.

Comparative example 3

Comparative example 3 the components of the water-based industrial paint interface water were: 10 parts diethylene glycol diethyl ether, 32 parts diethylene glycol dimethyl ether, 40 parts methyl isobutyl ketone, 10 parts methyl ethyl ketone, 7.2 parts moded FS3270 resin and 0.8 parts BYK-333.

Evaluation of Performance

The interface water prepared in the examples and the comparative examples is applied to the repairing process: spraying the water-based industrial paint finish on a place needing to be repaired; after 3-5min, spraying the interface water on the periphery of the interface and the paint surface of the whole repaired surface until the paint surface is glossy; after drying, the paint film was tested for properties. The water performance test items for the water industrial paint interfaces are as follows, see table 1.

TABLE 1 Water-based Industrial paint interface Water Performance test items

Wherein, 1 to 3 items are the conventional performance indexes of the interface water of the water-based industrial paint, and 4 to 9 items are the interface performance evaluation indexes.

Examples 1-4 the results of the performance tests are shown in table 2 below:

table 2 examples 1-4 performance test results

Comparative examples 1-3 the results of the performance tests are shown in table 3 below.

Table 3 comparative examples 1-3 performance test results

As shown in Table 2, examples 1 to 4 all had excellent storage stability, since the proper combination of solvent with evaporation rate and water solubility was selected and used with the thermoplastic acrylic resin, the resulting interface water dried fast and the appearance was good in repairing the water industry.

On the contrary, in comparative example 1, the solvent used was poor in water solubility and incompatible with the aqueous industrial paint, which resulted in the disadvantages of shrinkage cavity, loss of gloss and discoloration, and the aqueous industrial paint could not be repaired.

In comparative example 2, the solvent evaporation gradient collocation is not reasonable, and the water solubility is too high, although the paint is compatible with the water-based industrial paint, the problems of whitening, discoloration and the like are caused, and the drying speed is slow, so that the paint is not beneficial to field construction.

In the comparative example 3, due to the adoption of the hydroxy acrylic resin, the drying speed of the interface water is slow and cannot meet the current construction speed requirement.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims

1. The interface water for repairing the water-based industrial coating finish paint is characterized by comprising the following components in parts by weight:

2. The interface water according to claim 1, wherein the thermoplastic acrylic resin has a number average molecular weight of 20000 to 50000 and a weight average molecular weight of 40000 to 100000.

3. The interface water according to claim 1, wherein the glass transition temperature of the thermoplastic acrylic resin is 55-65 ℃.

4. The interface water of claim 1, wherein the first solvent is an ether ester solvent.

5. The interface water of claim 4, wherein the ether ester solvent is diethylene glycol ethyl ether acetate.

6. The interface water of claim 1, wherein the second solvent is an alcohol ether based solvent.

7. The interface water according to claim 6, wherein the alcohol ether solvent is selected from butoxyethanol and/or diethylene glycol dimethyl ether.

8. The interface water of claim 1, wherein the third solvent is a ketone solvent having a boiling point of 110 ℃ to 159 ℃.

9. The interface water according to claim 8, wherein the ketone solvent with boiling point of 110-159 ℃ is selected from methyl isobutyl ketone or/and cyclohexanone.

10. The interface water of claim 1, wherein the fourth solvent is selected from an ester solvent having a boiling point of 60 ℃ to 109 ℃ or a ketone solvent having a boiling point of 60 ℃ to 109 ℃.

11. The interface water of claim 10, wherein the fourth solvent is selected from methyl ethyl ketone and/or ethyl acetate.

12. The interface water of claim 1, wherein the surfactant is a polyalkylsiloxane or a modified polymer of a polyalkylsiloxane.

13. Use of a joint water for refinishing an aqueous industrial paint finish according to any one of claims 1 to 12, comprising the following steps:

spraying the water-based industrial paint finish on a place needing to be repaired; after 3-5min, spraying the interface water on the periphery of the interface and the paint surface of the whole repaired surface until the paint surface is glossy; forming a uniform and bright paint surface without repair marks after 3-5 min.